YOKOGAWA  PSCAMAAN A5E0023936304

PSCAMAAN A5E0023936304故障檢測(cè)：plc本身有很完善的自診斷功能，但在工程實(shí)踐中，plc的i/o元件如限位開關(guān)、電磁閥、接觸器等的故障率遠(yuǎn)遠(yuǎn)高于plc的本身故障率，這些元件出現(xiàn)故障后，plc一般不會(huì)察覺出來(lái)，不會(huì)立即停機(jī)，這會(huì)導(dǎo)致多個(gè)故障相繼發(fā)生，嚴(yán)重時(shí)會(huì)造成人身設(shè)備事故，停機(jī)后查找故障也要花費(fèi)大量時(shí)間[4]。為方便檢測(cè)故障可用梯形圖程序?qū)崿F(xiàn)，這里介紹一種邏輯組合判斷法：系統(tǒng)正常運(yùn)行時(shí)，PSCAMAAN A5E0023936304的輸入和輸出信號(hào)之間存在著確定的關(guān)系，因此根據(jù)輸出信號(hào)的狀態(tài)與控制過程間的邏輯關(guān)系來(lái)判斷設(shè)備運(yùn)行是否正常。               

PSCAMAAN A5E0023936304信息保護(hù)和恢復(fù)：當(dāng)偶發(fā)性故障條件出現(xiàn)時(shí)，不破壞plc內(nèi)部的信息，一旦故障條件消失，就可以恢復(fù)正常繼續(xù)原來(lái)的工作。所以，plc在檢測(cè)故障條件時(shí)，立即把現(xiàn)狀態(tài)存入存儲(chǔ)器，軟件配合對(duì)存儲(chǔ)器進(jìn)行封閉，禁止對(duì)存儲(chǔ)器的任何操作，以防存儲(chǔ)器信息被沖掉，一旦檢測(cè)到外界環(huán)境正常后，便可恢復(fù)到故障發(fā)生前的狀態(tài)，繼續(xù)原來(lái)的程序工作。

Pscamaan a5e0023936304 fault detection: PLC itself has perfect self diagnosis function, but in engineering practice, the fault rate of PLC I / O components such as limit switch, solenoid valve and contactor is much higher than that of PLC itself. After these components fail, PLC generally will not detect and stop immediaby, which will lead to multiple faults one after another, In severe cases, personal and equipment accidents will be caused, and it will take a lot of time to find the fault after shutdown [4]. In order to facilitate the detection of faults, a logic combination judgment b is introduced here: when the system operates normally, there is a certain relationship between the b and output signals of pscamaan a5e0023936304. Therefore, whether the equipment operates normally is judged according to the logical relationship between the state of the output signal and the control process.


Pscamaan a5e0023936304 inbation protection and recovery: when accidental fault conditions occur, the internal inbation of PLC will not be damaged. Once the fault conditions disappear, it can return to normal and continue the original work. Therefore, when PLC detects the fault conditions, it immediaby stores the current state in the memory, and the software cooperates to close the memory and prohibit any operation on the memory, so as to prevent the memory inbation from being washed out. Once the external environment is detected to be normal, it can return to the state before the fault and continue the original program work.

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